In a recent interview, The Flash‘s executive producer discussed the tease for Grodd’s arrival and compared it to how Slade was introduced on Arrow.
“I wouldn’t say teased,” Greg Berlanti said. “I would say we’re going to deal with it this year. The comparison I make is a little bit to Slade the first year on Arrow in the sense of we started with the mask in the pilot and then we saw which way we were going. He was, ultimately, in the back half of that first season even more than we would ever do with Grodd this first year because… We’re going to have to get the technology right and all the stuff right to make it look and feel real. But a lot of times, we do this stuff not as a tease as much as a challenge to ourselves of, “Can we do it?” Grodd’s definitely one of those, so we hope we pull it off.”
